Mobile power supply



FIG. 1 is a front elevational view of a mobile power supply showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left-side elevational view thereof;

FIG. 4 is a right-side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The mobile power supply is used to provide power to a portable electronic device. 

CLAIM The ornamental design for a mobile power supply, as shown. 